.com_bottom .useful{
	float: right;
	font-size: 10px;
	padding: 0 15px;
	text-align: center;
	line-height: 20px;
	border-radius: 10px;
	color: #999999;
	border: 1px solid #999999;
}
.com_bottom .useful.usefulClick {
	color: #F32D27;
	border: 1px solid #F32D27;
}